KR910006496B1 - Fully enclosed die forging apparatus - Google Patents

Abstract

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Description

Block forging device

1 is a longitudinal sectional view showing one embodiment of the block forging apparatus of the present invention.

2 is a plan view of the support member of FIG.

3 is a front view seen from the direction A of the support member of FIG.

4 is a plan view showing a state in which the horizontal cam and the longitudinal cam is disposed on the support member of the present invention.

5 is an explanatory diagram for explaining the operation of the cam mechanism of FIG.

6 is a plan view showing a lower guide disposed in the push piston of the present invention.

7 is a plan view showing the pressing link disposed in the cylinder of the present invention.

FIG. 8 is a longitudinal sectional view showing a state where a material of the closed forging device of FIG. 1 is inserted;

9 is a longitudinal sectional view showing a cylinder of another embodiment of the closed forging apparatus of the present invention.

10 is a plan view showing an example of a closed forged product.

11 is a longitudinal sectional view of FIG.

12 is a side view of a material.

13 is a longitudinal sectional view showing a conventional closed forging method.

14 and 15 are longitudinal cross-sectional views each showing a conventional closed forging apparatus.

16 to 18 are explanatory views showing the cam mechanism of FIG.

* Explanation of symbols for main parts of the drawings

11: molded article 13: material

15: upper die 17: lower die

19, 21: Joint part 23: We Punch

25: punch down 27: cross section

29: cavity 31: cross section

33: Slide of the Press 34: Ballstar

35: Bed 36: Preserpin

37: Presser pin down 38: cavity

60: slide of the press 61: upper dieset plate

62: insert plate 63: knock pin

64: cushion rod 65: cushion pin

66: knock out node 67: upper die holder

68: cam holder 69: first cam

70: die die 71: punch block

72: Whip Punch 73: Ball Star

74: lower die set plate 75: insert plate

76: knock out rod 77: knock out pin

78: cushion rod 79: cushion pin

80: lower die holder 81: knock pin

82: knock pin 83: plate

84: pad 85: pad

86: spring 87: pressure pin

88: cushion link 89: pressure pin

90: lower die 91: punch block

92: Dianeville 93: Punch Down

94: second cam 94a: step

95: Guide 96: Guide Home

97: third cam 98: fourth cam

143: slide of the press 144: upper dieset plate

145: upper insert plate 146: bolt

147: upper cylinder 148: upper piston

149: pin applying upward force 150: upper die

151: upper punch 152: product to be molded

153: common part 154: knock out pin

155: upper die holder 156: cam mechanism operating portion

157: ball star of the press 158: lower dieset plate

159: lower insert plate 160: bolt

161: lower cylinder 163: lower piston

164: pin for applying downward force 165: lower die holder

166: support member 167: bolt

168: lower holder 169: lower guide

170: die down 171: punch down

172: cavity 173: knock out pin

174: auxiliary cylinder 175: auxiliary piston

176: cam mechanism 177: large diameter portion

178: notch 179: cam surface

180: horizontal cam 181: cam surface

182: cam surface 183: longitudinal cam

184: cam surface 185: push pin

186: piston 186a: piston portion

187: cylinder 188: pressing ring

189: Volt 190: threaded portion

191: nut 192: cylinder

193: push pin 194: piston

195: oil groove 196: seal part

197: fluid supply hole 198: drain hole

199: interval

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed forging device, and in particular, moving a die held in contact with a slider toward a fixed side punch at a speed slower than a slide moving speed so that both punches intrude into the die. A closed block forging device having a die moving mechanism.

In the prior art, the closed forging in which a material is formed in a cavity obtained by contacting a pair of dies has a high ratio of products to materials, and a product having a complicated shape can be manufactured with high precision. Molding of many products is used a lot. The conventional blockage forging of the molded article 11 represented by the spider of the tripod type constant velocity joint for automobiles of the shape as shown in FIG. 10 and FIG. 11 is the cylindrical material 13 shown in FIG. ) Is inserted into the cavity portions 19 and 21 formed of the upper die 15 and the lower die 17, as shown on the left side of FIG. 13, and the upper and lower punches 23 and 25 ) Are manufactured by approaching each other as shown on the right side of FIG. However, like the molded article 11 described above, when the shape of the target molded article 11 is face symmetric with respect to the end face 27 of the largest area, the above-described upper die 15 and the lower die 17 contact each other. It is necessary to operate the upper and lower punches 23 and 25 with respect to the end face 31 of the maximum area of the cavity 29 while maintaining the state where the closing force is applied.

For this reason, the block forging apparatus as shown in FIG. 14 is used conventionally. This closed-forging apparatus shows the hydraulic or mechanical double acting press as an example, and the left half of the figure shows the state before shaping | molding, and the right half of the figure shows the state after shaping | molding, respectively.

In the figure, 11 is a molded article, 13 is a material, 15 is a die above, 17 is a die below, 23 is a punch above, 25 is a punch below, and 33 is a slide of a press. (34) is the ball star, (35) is the bed, (36) is the press pin, and (37) is the lower press pin.

In this block forging apparatus, first, the material 13 is injected into the cavity 38 of the lower die 17 by hand or conveying apparatus. Next, when the slide 33 of the press descends, the upper and lower dies 15 and 17 come into contact with each other. In the hydraulic press, the slide 33 is forced downward by the hydraulic device. In the slide 33, the slide 33 stops at the bottom dead center, and the closing force is applied to the upper and lower dies 15 and 17.

Subsequently, in the hydraulic press, a hydraulic system of a system separate from the driving of the slide 33 formed on the slide 33 side and the bed 35 side is operated. In the case of the mechanical press, the slide ( 33) The drive device formed separately from the drive is operated, thereby operating the upper and lower press pins 36 and 37, and the upper and lower punches 23 and 24 have the cross section 31 described above. ), And the material 13 is pushed toward the cavity 19 formed in the upper and lower dies 15 and 17 for processing. Then, after molding, the slide 33 is described in detail, and the upper and lower dies 15 and 17 fall, and the upper and lower punches 23 and 25 by the hydraulic device during the rising or at the upper limit of the rising. ) Is operated, and the molded article 11 is discharged in the die. However, in order to apply such a closed forging apparatus to a hydraulic press, it is necessary to use a northeast press, so that it becomes a dedicated device for the molded article 11, which does not have general purpose, and at the same time, the upper and lower punches 23 ), When the temperature change of the hydraulic pressure for operating the 25 and the mixing of bubbles into the hydraulic pressure occur, the speeds of the upper and lower punches 23 and 25 are changed to improve the product precision of the molded product 11. In order to avoid this and to avoid this, it was necessary to add a correction mechanism that always performs the flow rate adjustment appropriately. In addition, in the case of application to a mechanical press, a drive device for driving the upper punch 23 is formed on the slide 33 side, and a dedicated device in which a pressure drive device is formed on the bed 35 side, and also the upper and lower dies. Since (15) and (17) are brought into close contact with each other at the bottom dead center, the closing force is not stable. Therefore, more closing force is applied to the press and the upper and lower dies 15 and 17, resulting in a shorter mold life. There was a flaw.

The present applicant drives a lower die through a block forging device disclosed in Japanese Patent Laid-Open No. 59-133927 as a block forging device capable of eliminating such a defect. On the inside of the upper die holder 67, the upper die 70 is fitted so that the lifting and lowering is free. And inside this weed 70, the punch block 71 and the wee punch 72 are fitted so that lifting / lowering is free. On the other hand, the lower die-set plate 74 is fixed to the ball star 73, and the insert plate 75 is inserted into the die-set plate 74. In addition, a knock-out rod 76 is formed in the ball star 73 so that the knock-out pin 77 is pushed up at a predetermined timing by a pushing force by a pressure fluid or a mechanical device. Similarly, in the ball star 73, a cushion rose 78 is formed to force the cushion pin 79 in the insert plate 75 upward. The lower die holder 80 is positioned and fixed to the lower die holder 80 with the lock pin 81, and the plate 83 is attached to the die holder 80 via the knock pin 82. Positioning is inserted. Also, in the lower die holder 80. The pads 84 and 85 are assembled, and the springs 86 are fixed between the pads 84 and 85 in a compressed state. In addition, the spring 86 applies upward force to a lower die, which will be described later, via the pressure pin 87 penetrating the plate 83 and the pad 84.

Inside the spring 86, the cushion link 88 is disposed so as to freely lift and lower, and the force applied by the cushion pin 79 via the cushion link 88 to the lower die 90 from the pressure pin 87 It is configured to deliver. In addition, the center of the upper surface of the insert plate 75, the die block 92 is formed by inserting the punch block 91 so as to freely lift, and the lower punch 93 on the upper portion of the punch block 91 The lower punch 93 is pushed up at a predetermined timing by mounting the knock out pin 77. On the other hand, a guide 95 for guiding the second cam 94 is fixed to the lower die holder 80.

The second cam 94 is fitted in the inner diameter portion of the guide 95 in a circular shape so as to be free from sliding, and the inner diameter portion of the cam 94 is fitted into the lower die 90. have. In addition to engaging the stepped portion 94a of the cam 84 with the stepped portion of the lower die 90, the cam 94 is moved upward and downward in the guide groove 96 along the center of the die 90. Only the sliding movement is kept free. In addition, between the first cam 69 and the second cam 94, the third and fourth cams 97 which are freely slid in the circumferential direction by the lower die 90 and the guide 95 are free. If the first cam 69 is lowered by forming the () and (98), the second cam 94 is moved downward through the third and fourth cams 97 and 98.

16 to 18 are diagrams showing the arrangement and operating states of the cams. As can be seen from these figures, two first cams 69 are formed at diagonal positions of the cam holder 68. It is formed in a columnar shape narrowing downward, and the inclined surface of the first cam 69 is positioned between the inclined surfaces of the base ends of the third, fourth cams 97 and 98 adjacent to each other. . Further, the second cam 94 is formed in a lot out of the 90 ° phase with the first cam 69, and is formed in a columnar shape that extends downward. The second cam 94 has a third and fourth cam 97 inclined surfaces. ) And (98) are positioned below the inclined surface of the front end, so that when the first cam 69 is lowered, the third and fourth cams 97 and 98 move in the circumferential direction and the second cam is lowered. To push down. In addition, the base ends of the third and fourth cams 97 and 98 are inclined surfaces facing upward, and the front ends are inclined surfaces facing downward.

In the closed forging device configured as described above, the material inserted into the cavity of the lower die 90 is molded with the upper and lower dies 70 and 90 closed, and the knock-out pin 77 It is taken out by the action of the back.

In the blockage forging device, the upper and lower dies 70 and 90 come into contact with each other, and as shown in FIG. 17, the third and fourth cams 97 and 98 and the first one are shown. The cam 69 is in contact. As a result, when the slide 60 is lowered and the first cam 69 is lowered, the adjacent third cam 97 and the fourth cam 98 move in the horizontal direction, and both cams 97 and 98 are moved. The second cam 94 sandwiched between the two members is pushed down.

As a result, the die 90 engaged with the second cam 94 descends.

The lowering speed of the die 90 becomes slower than the lowering speed of the punch 72 by setting the angle of each cam surface to a predetermined angle, and the upper and lower punches 72 and 93 are upper, lower, and lower speeds. It moves relative to the lower die 70,90.

As a result, since the lower punches 93 do not move despite the lowering of the upper and lower dies 70 and 90 at a lower speed than the lowering speed of the upper punches 72, The desired molding is performed while the upper and lower dies 70 and 90 intrude and move in the upper and lower dies 72 and 90, respectively. However, in such a conventional occlusion apparatus, the upper and lower dies 70 and 90 held in contact with the movement of the slide 60 are directed toward the lower punch 93 on the fixed side. The cam 69 of the cam mechanism which moves at a speed slower than the movement speed and moves the upper and lower punches 72 and 93 into the upper and lower dies 70 and 90, respectively, is called a cam arc. Since it is directly attached and fixed to the holder 68, when an abnormal force or the like acts on the cam mechanism or the like, the cam mechanism or the like may be damaged.

SUMMARY OF THE INVENTION An object of the present invention is to provide a blockage afterglow device which can reliably prevent a large force from acting on the cam mechanism by solving the above problems.

As a means for solving the object of the present invention, the closed forging device of the present invention, the upper die and the lower die disposed to face up and down between the slide and the ball star, the slide or the lower end of the slide An upper cylinder mechanism disposed on an upper die set plate disposed on the upper cylinder mechanism for applying force to the upper die downward, and a lower die set plate disposed on the ball star or an upper end of the ball star, and placing the lower die upward. A lower cylinder mechanism for exerting a force toward the center, an upper punch inserted into the upper die and moving in synchronization with the operation of the slide, a lower punch inserted into the lower die and supported by the ball star; Slower movement of the slide towards the upper die and lower die towards the punch An occlusion forging device having a cam mechanism for moving both punches in a die to move at a speed, wherein the cam mechanism is operated by a lower end of a push pin for moving the cam mechanism downward in synchronization with the movement of the slide. At the same time, the upper end of the push pin is in direct or indirect contact with the piston of the cylinder moving in synchronization with the movement of the slide.

In addition, in the above-mentioned closed forging apparatus of the present invention, several cylinders which move in synchronization with the movement of the slide are arranged, and the position of the upper end surface thereof can be simultaneously adjusted by the position adjusting mechanism.

In the closed forging device of the present invention having the above-described configuration, the cam mechanism is configured to operate by the lower end of the push pin which is moved downward in synchronization with the movement of the slide, and the upper end of the push pin is operated. The movement does not exert a very large force on the cam mechanism. In addition, in the closed forging device of the present invention, the upper end position of several cylinders is simultaneously adjusted by operating the position adjusting mechanism.

EMBODIMENT OF THE INVENTION Hereinafter, the Example shown in the figure for detailed description of this invention is described. 1 shows an embodiment of the closed forging apparatus of the present invention, in which the upper die set plate 144 is fixed to the slide 143 of the press.

The upper die set plate 144 is fixed by the upper insert plate 146. An upper cylinder 147 is formed in the upper die set plate 144, and an upper piston 148 is inserted into the upper cylinder 147. The pin 148 which applies an upward force is arrange | positioned at the lower surface of the upper piston 148, and the lower end of the pin 149 which applies this upward force touches the upper surface of the upper die 150. As shown in FIG.

The upper punch 151 is inserted into the center portion of the upper die 150, and the cavity 153 corresponding to the shape of the product 152 to be molded is formed in the lower portion of the upper die 150. . The knock out pin 154 is disposed so as to be freely raised and lowered through the center portions of the upper die set plate 144 and the upper insert plate 145.

An upper die holder 155 is fixed to the upper die set plate 144, and a cam mechanism operating portion 156 for operating a cam mechanism described later is provided on an outer circumference of the upper die holder 155. It is arranged. On the other hand, the lower die-set plate 158 is fixed to the ball star 157 of the press. The lower insert 158 is fixed to the lower die set plate 158.

The lower insert plate 159 is fixed to the lower die set plate 158 by the bolt 160. The lower cylinder 161 is formed in the lower die set plate 158, and the lower piston 163 is inserted into the lower cylinder 161.

On the upper surface of the lower piston 163, a pin 164 is applied to the lower force, and the upper end of the pin 164 to apply the lower force is to insert the lower die holder 165 through, The bottom surface of the support member 166 accommodated in the lower die holder 165 is brought into contact.

The lower die holder 165 is fixed to the lower die set plate 158 by a bolt 167, and the lower holder 168 and the lower guide are positioned above the lower die holder 165. 169 is arranged in order.

The lower die 170 is inserted into the lower guide 169.

The lower punch 171 is inserted in the center of the lower die 170 and the supporting member 166, and the cavity 172 corresponding to the shape of the product 152 to be molded is inserted in the upper portion of the lower die 170. ) Is formed.

A knock out pin 173 is disposed to freely lift up and down through the center portions of the lower die set plate 158, the lower insert plate 159, and the lower die holder 165.

An auxiliary cylinder 174 is disposed in the lower die holder 165, and in the auxiliary cylinder 174 is accommodated an auxiliary piston 175 contacting the lower pad 166 via a pin at an upper end thereof. It is. In this embodiment, a cam mechanism 176 for moving the lower pad 166 is disposed on the lower pad 166. The cam mechanism 176 has a speed lower than the movement speed of the slide 143 toward the lower punch 171 of the fixed shaft with the upper die 150 and the lower die 170 held in contact with the movement of the slide 143. As a result, the upper and lower punches 151 and 171 act on the upper and lower dies 160 and 170, respectively.

That is, as shown in FIG. 2 and FIG. 3, a large diameter part 177 is formed in the lower part of the support member 166, and this large diameter part 177 has an angle of 90 degrees. Four cutouts 178 are formed. And the cam surface 179 is formed in this notch 178, respectively. As shown in FIG. 4 and FIG. 5, the cam surface 179 is in contact with the cam surface 179 of the horizontal cam 180 of a rectangular body. Moreover, the cam surface 184 of the plate-shaped longitudinal cam 183 touches the cam surface 182 formed at the other end of the lateral cam 180. The cam surface 184 of the pin shaped longitudinal cam 183 is in contact with the cam surface 182 formed at the other end of the lateral cam 180.

The lower end of the push pin 185 of the cam mechanism operating part 156 shown in FIG. 1 touches the upper surface of the longitudinal cam 183. 4 and 5, the left side of the figure shows the state when the longitudinal cam 183 is in the box point position, and on the right side, the longitudinal cam 183 is pressed by the push pin 185 and the bottom dead center point. Each state at the position is shown.

As shown in FIG. 1, the cam mechanism operating part 186 has a piston 186 that is in contact with the upper surface of the push pin 185, and is formed on the upper part of the piston 186. Is inserted into the cylinder 187. In this cylinder 187, oil of a constant pressure is supplied, and when a very large force acts on the piston 186, the piston 186 can move upward.

The cylinder 187 is supported by a ring-shaped pressing ring 188, and the pressing ring 188 is fixed to the upper die holder 155 by a bolt 189. In addition, a threaded portion 190 is formed on the outer circumference of the upper die holder 155, and the nut 191 for determining the position of the upper end of the cylinder 187 which is arranged in several at the same time is provided in the threaded portion 190. The position adjustment mechanism which consists of these is screwed. In addition, as shown in FIGS. 6 and 7, the push pins 185 and the cylinders 187 are disposed at four locations in a rectangular shape corresponding to the positions of the longitudinal cams 183.

In the closed forging device configured as described above, as shown in FIG. 8, the material 13 inserted into the cavity 172 of the lower die 176 includes the upper die 150 and the lower die 170. When in contact, the lower surface of the piston 186 is in contact with the upper surface of the push pin 185. Subsequently, when the slide 143 is lowered and the push pin 185 is lowered, the vertical cam 183 descends, as shown on the right side of FIG. 4 and FIG. The pad 166 is moved downward by pressing in the cam surface 179 direction of the pad 166. When the cam angles of the longitudinal cam 183 and the lateral cam 180 are α and β, respectively, the ratio of the descending speed of the pad 166 to the longitudinal cam 183 is obtained as tan α x tan β.

Therefore, after the longitudinal cam 183 is in contact with the lateral cam 180, the lower die 170 is lowered at a slower speed than the upper punch 151 as the upper punch 151 is lowered, and the upper punch 151 and The lower punch 171 moves relative to the upper die 150 and the lower die 170.

That is, although the upper die 150 and the lower die 170 are lowered at a lower speed than the lowering speed of the upper pinch 151, the lower punch 171 does not move. Since the punch 159 and the lower punch 171 intrude into the upper die 150 and the lower die 170, respectively, and move in a low direction, the desired molding is performed.

Further, for example, after the upper die 150 and the lower die 170 are in contact with each other, when they are lowered at a rate of 1/2 of the lowering speed of the slide 143, that is, the molded article has a cross section of the largest area. In the case of surface symmetry, the angles α and β of the longitudinal cam 183 and the lateral cam 180 may be 35 degrees 15 minutes 2 seconds in theory.

Here, if the generating force of the upper cylinder 147 is Pu, the generating force of the lower cylinder 161 is Pl, the generating force of the auxiliary cylinder 174 is Ps, and the force that the horizontal cam 180 presses the support member 166 is Pc, The force Fu exerted on the upper die is Fu = Pu The force F1 exerted on the lower die is Fl = Pl + Ps = Pc.

In the case where the molded article is symmetrical with respect to the cross section of its maximum area, Fu = Fu + Fl.

That is, PT = (Pl-Pu) + Ps.

Here, Pc> O is required for each cam surface to keep in contact with each other.

This condition is satisfied when P _L > P _V even when there is no auxiliary cylinder (Ps + O), but the cam operation is stabilized, that is, the die of the upper punch 151 and the lower punch 171 during molding ( In order to stabilize the relative speed with respect to 150 and 170, and to obtain a highly accurate molded article, it is preferable that the force applied to each cam surface, ie, Pc, is constant. However, P _L, P _U is the viscosity or the like changes by changes of pressure fluid, air bubbles mixed into the fluid to a pressure (for _{P s = O) P C =} P L -P U is hard to be constant.

In order to stabilize the force applied to the cam surface, the cylinder diameters of the upper cylinder 147 and the lower cylinder 161 may be the same, and the pressure fluid may be supplied from a common pressure fluid supply device. In this way, even when the viscosity change of the pressure fluid and the mixing of bubbles into the pressure fluid occur, P _L = P _U and P _C = P _s . When the pressure fluid at ordinary pressure is supplied to the auxiliary cylinder, P _S, that is, P _C becomes constant, and the force applied to the cam surface is stable, and a molded article of high precision is obtained. In the closed forging device configured as described above, the cam mechanism 176 is configured to operate by the upper end of the push pin 185 for moving the cam mechanism 176 downward in synchronization with the movement of the slide 143. Since the upper end of 185 is in direct contact with the piston of the cylinder 187 moving in synchronization with the movement of the slide 143, that is, the lower end of the piston 186 having the piston portion 186a in the portion, When a very large force is applied to the cam mechanism 176 by the movement of the slide 143, the pin 186 moves upwards inversely to the pressure of the pressure fluid in the cylinder 187, so that the cam mechanism 176 There is no great force at work. Therefore, it is possible to reliably prevent a very large force from acting on the cam mechanism 176, and to prevent damage to the cam mechanism 176 or the like reliably.

Moreover, in the closed forging apparatus comprised as mentioned above, it puts between the upper die 150 of the closed state, the lower die 170, and the lower cylinder 161 mechanism, and supports the lower die 170 directly, A support member composed of a support member 166 directly exerting a force upward by the cylinder 161 mechanism, a push pin 185 moved downward in synchronization with the movement of the slide 143, and the push pin 185 Since the lower pad 166 is configured as a cam mechanism 176 that moves downward at a slower speed than the movement speed of the slide 143, the cams are moved to the outer periphery of the lower die as in the prior art. It is not necessary to arrange and lower the lower die directly by these cams. As a result, the degree of freedom in the arrangement of the cam mechanism is increased, and as shown in FIGS. 2 to 5, the cam mechanism 176 can be configured as a straight cam, and the cam mechanism can be greatly simplified. There is a number. In addition, in the closed forging device configured as described above, the upper surface of the cylinder 187 is brought into contact with the lower surface of the nut 191 serving as the positioning mechanism, so that the positioning of the cylinder 187 in the up and down directions can be performed. , pressing ring by being loosely loosen, adjust the position of the nut 191 to 188, it is possible to adjust the position of the multiple cylinders 187 at the same time fine, pushing that part position H _1, the dimensions of the H ₂ of the shaped article It is possible to easily adjust (FIG. 1).

This is effective for correcting the dimensional change of the molded article during mass production and for adjusting the replacement of the mold with a new mold.

9 shows a cylinder in another embodiment of the closed forging apparatus of the present invention. In this embodiment, the cylinder 192 includes a piston 194 for pressing the push pin 193 downward. The oil groove 195 is formed in the side surface of this piston 194, and the seal part 196 is formed in the lower surface. In addition, the fluid supply hole 197 is opened in the upper portion of the cylinder 192, and the drain hole 198 is opened in the lower portion of the cylinder 192. In such a cylinder 192, when a very large force is applied to the push pin 193, the push pin 193 moves upwards, thereby moving upwards of the piston 194 as shown on the right side of FIG. And a gap 199 is formed between the seal portion 196 of the piston 194 and the cylinder 192, and the pressure fluid in the cylinder 192, as indicated by the arrows in the figure, is connected to the piston 194. After passing through the oil groove 195 and the gap 199 of the, it flows out of the cylinder 122 in the drain hole 198.

As a result, the pressure in the cylinder 192 decreases rapidly, and the piston 194 can move further upward, and the force acting on the push pin 193 is promptly removed. In addition, in the above-described embodiment, an example in which the upper surface of the supporting member 166 is brought into contact with the lower surface of the lower die 170 and the cam mechanism 176 is disposed on the lower pad 166 have been described. The present invention is not limited to this embodiment. For example, the cam mechanism may be formed on the piston of the lower cylinder, for example.

As described above, according to the blockage forging device of the present invention, the cam mechanism is configured to operate by the lower end of the push pin for moving the slide downward in synchronization with the movement of the slide, and the upper end of the push pin is slid. Since it is in direct or indirect contact with the piston of the cylinder moving in synchronism with the movement of the motor, there is an advantage that it is possible to reliably prevent the very large force from acting on the cam mechanism. Moreover, according to the closed-forging apparatus of this invention, since the position adjustment mechanism which adjusts the position of several cylinders simultaneously is formed, there exists an advantage that the position of the part which pushes out a molded article can be adjusted easily.

Claims (7)

A slide 143 having an upper die set plate 144, a ball star 157 having a lower die set plate 158, and a vertical direction between the slider 143 and the ball star 157. An upper die 150 and a lower die 170, an upper cylinder 147 disposed on the upper die set plate 144 that presses the upper die 150 downward, and the lower die 170 ) Supports a lower cylinder 161 disposed on the lower die set plate 158 to pressurize upwards, and a lower die 170 and is located between the lower die 170 and the lower cylinder 161. A support member 166, an upper punch 151 inserted into the upper die 150 that moves simultaneously with the movement of the slide 143, and a ball star 157 inserted into the lower die 170; Bottom fern supported by) 171 and a cam mechanism 176, wherein the cam mechanism 176 is composed of at least one horizontal cam 180 and at least one longitudinal cam 183 in contact with the horizontal cam. The support member 166 and the lateral cam 180 are engaged with each other, and at least one push pin 185 and 193 has an upper end portion and a lower end portion, and the push pin cylinders 187 and 192 In order to reduce the movement of the support portion corresponding to the movement of the lateral cam 180 formed by the longitudinal cam 183, the movement of the lower end and the slide 143 in contact with the longitudinal cam 183 for the corresponding movement is simultaneously performed. In order to have a piston 186, 194 for contacting the upper end of the input pin, the punch 151, 171, all the movement in the downward direction at a slower speed than the movement speed of the slide 143 The die 150, by the upper die 150 and the frying lower die 170. A blockage forging device configured to accelerate movement into 170. The method of claim 1, wherein the adjusting means 191 is a closed forging device is provided to determine the position of the push pin cylinder 187, 192, The method of claim 2, wherein the adjusting means (191) consists of a plurality of pushpins (185), (193) and corresponding pushpin cylinders, each pushpin cylinder (187), (193) to the slide (143) Located in a vertical direction with respect to the upper die set plate 144, the adjusting means being composed of a nut 191 that is engaged with the upper die holder 125 by screwing, the nut being formed in each of the cylinders 187. ), A block forging device in which each of the pressure pin cylinders 187, 192 abuts at the upper end to determine the vertical position of the 192 at the same time. The cam device 176 according to any one of claims 1 to 3, wherein the cam mechanism 176 is composed of a plurality of linear horizontal cams 180 operated by a vertical cam 183, and the horizontal cam is the support member 166. Block forging device interlocked with). The cam mechanism 176 according to any one of claims 1 to 4, wherein the cam mechanism 176 hangs a corresponding plurality of linear horizontal cams 180 having a cam surface 181 for engaging the piston of the lower cylinder mechanism 161. Closed forging device comprising a plurality of vertical cam (183) to fit. 6. A blockage forging device according to any one of the preceding claims, wherein the cam mechanism (176) comprises a plurality of pressure pins (185, 193). The piston pin 194 according to any one of claims 1 to 5, wherein the pressure pin cylinder 192 includes a groove 195 formed on a side surface and a seal portion 196 formed on a lower surface thereof. And a liquid supply hole 197 provided in the upper portion of the cylinder 192, and a drain hole 198 provided in the lower portion of the cylinder 192, so as to rapidly reduce the pressure in the cylinder. A space 199 is formed in the cylinder 192 of the seal portion 196 that permits the outflow of pressure oil so that the piston 194 moves upwardly, through the liquid supply hole 197. The pressure pin 193 abutting against the piston 194 quickly forces the force from the pressure pin 193 so that the pressure pin moves the upper pressure pin upward when the pressure oil is forced into 192. To be removed Closed forging apparatus in which the piston 194 is further configured to move in an upward direction.

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